Related Experiment Video
Updated: Jun 25, 2026
11:28
A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
12.5K
Development of Improved Confined Compression Testing Setups for Use in Stress Relaxation Testing of Viscoelastic
Anthony El Kommos1, Alicia R Jackson1, Fotios Andreopoulos1
1Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33146, USA.
Gels (Basel, Switzerland)
|May 24, 2024
Summary
This study introduces a novel 3D-printed confined compression apparatus for precise mechanical testing of biomaterials. The enhanced setup improves accuracy and sample visibility, crucial for tissue engineering advancements.
Area of Science:
- Biomaterials Science
- Mechanical Engineering
- Tissue Engineering
Background:
- Accurate mechanical assessment is vital for developing cell-based biomaterial alternatives in tissue engineering.
- Conventional compression testing setups may lack precision and sample visibility.
- Biomaterial developers need specialized tools for reliable mechanical characterization.
Purpose of the Study:
- To develop and validate a novel 3D-printed confined compression apparatus.
- To enhance force measurement precision and sample visibility during compression testing.
- To compare the performance of the novel apparatus against conventional setups.
Main Methods:
- Fabrication of a novel 3D-printed confined compression apparatus using clear resin.
- Performance comparison with a conventional setup using stress relaxation tests on hydrogels.
- Assessment of equilibrium force, aggregate modulus, and peak force.
Main Results:
- The revised setup captures a wider range of force values with improved accuracy.
- Significant differences in force and aggregate modulus were detected in hydrogels with varying crosslinking.
- Clear resin improved sample visibility, allowing real-time monitoring during testing.
Conclusions:
- The novel 3D-printed confined compression apparatus offers enhanced precision and accuracy for biomaterial mechanical testing.
- Improved sample visibility facilitates real-time monitoring and informed assessment of biomaterial behavior.
- This development supports advancements in tissue engineering by providing a superior tool for biomaterial characterization.
Related Concept Videos
01:10Stress-Strain Diagram
A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This change in...
01:23Poisson's Ratio
Poisson's ratio is a material property that indicates their stress response. It explains the connection between the elongation or compression a material undergoes in the direction of an applied force and the contraction or expansion it experiences perpendicular to that force. When a slender bar is loaded axially, it stretches in the direction of the force and contracts laterally. Poisson's ratio is the negative ratio of this lateral contraction to the axial elongation. The negative sign ensures...
01:21Bulk Modulus
The bulk modulus is a scientific term used to describe a material's resistance to uniform compression. It is the proportionality constant that links a change in pressure to the resulting relative volume change.
01:23Behavior of Concrete Under Compressive Load
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
As the concrete specimen fractures under...
01:18Mechanical Characteristics of Steel
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used to...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used to...